Charge Symmetry Breaking and Nuclear Pion Production Reactions

Abstract

Large momentum transfer reactions such as pion production represent the frontier of Chiral Perturbation Theory and must be understood before more complex reactions can be considered. Pion production is also interesting in its own right, one application being the hadronic extraction of a charge symmetry breaking parameter: the contribution of the down-up quark mass difference to the neutron-proton mass difference. This dissertation reports on two primary projects: (1) a calculation of the charge symmetry breaking forward-backward asymmetry of the differential cross section of the n p -> d pi^0 reaction, and (2) the development of a new theoretical framework addressing the issue of reducibility in the impulse approximation's contribution to pion production. It is shown that the traditional one-body impulse approximation must be replaced by a two-body operator which makes a larger contribution to s-wave pion production.

arXiv commentPhD Thesis, 153 pages

References in corpus (42)

• An accurate nucleon-nucleon potential with charge-independence breaking
• Accurate Charge-Dependent Nucleon-Nucleon Potential at Fourth Order of Chiral Perturbation Theory
• Construction of high-quality Nucleon-Nucleon potential models
• Chiral Dynamics in Nucleons and Nuclei
• Effective Field Theory for Few-Nucleon Systems
• The two-nucleon system at next-to-next-to-next-to-leading order
• Model-independent low momentum nucleon interaction from phase shift equivalence
• Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD
• Physical Results from 2+1 Flavor Domain Wall QCD and SU(2) Chiral Perturbation Theory
• Meson production in nucleon--nucleon collisions close to the threshold
• Parameter-free effective field theory calculation for the solar proton-fusion and hep processes
• Chiral Perturbation Theory Beyond One Loop
• Leading SU(3)-breaking corrections to the baryon magnetic moments in Chiral Perturbation Theory
• The $pp\to pp{\pi }^0$ Reaction near Threshold: A Chiral Power Counting Approach
• Variation of Fundamental Couplings and Nuclear Forces
• Close-to-threshold Meson Production in Hadronic Interactions
• Strong-Isospin Violation in the Neutron-Proton Mass Difference from Fully-Dynamical Lattice QCD and PQQCD
• Chiral Three-Nucleon Forces from p-wave Pion Production
• Phenomenological Aspects of Isospin Violation in the Nuclear Force
• Towards a field theoretic understanding of NN->NNpi
• Chiral Perturbation Approach to the pp -> pp pi0 Reaction Near Threshold
• Role of heavy-meson exchange in pion production near threshold
• The reaction $pp\to pp{\pi }^0$ near threshold
• SU(2) and SU(3) chiral perturbation theory analyses on baryon masses in 2+1 flavor lattice QCD
• Deconstructing triplet nucleon-nucleon scattering
• Complete next-to-leading order calculation for pion production in nucleon-nucleon collisions at threshold
• Charge symmetry breaking in n p --> d pi^0
• Extraction of the strong neutron-proton mass difference from the charge symmetry breaking in pn-->d pi0
• The reactions $pp\to pp{\pi }^0$ and $pp\to d{\pi }^{+}$ at threshold: The role of the isoscalar $\pi N$ scattering amplitude
• p-Wave pion production from nucleon-nucleon collisions
• The N N -> NN pi+ Reaction near Threshold in a Chiral Power Counting Approach
• Threshold $pp\to pp{\pi }^0$ up to one-loop accuracy
• The near threshold N N -> d pi reaction in chiral perturbation theory
• Precision determination of the dpi -> NN transition strength at threshold
• Chiral Limit of Nuclear Physics
• Toy Model for Pion Production in Nucleon-Nucleon Collisions
• Remarks on N N -> N N pi beyond leading order
• Charge Symmetry Breaking in the n p --> d pi^0 reaction
• The Relation Between Equal-Time and Light-Front Wave Functions
• Isospin breaking in the reaction np --> dpi^0 at threshold
• Impulse approximation in nuclear pion production reactions: absence of a one-body operator
• Impulse approximation in the n p --> d pi^0 reaction reexamined